This paper investigates that the excess investment in Treasury Bills & Treasury Bonds in 2013 in Bangladesh was more profitable than other investment such as loans & advances for Banks (Conventional Commercial Banks) & other Financial Institutions (FIs). In 2013, country's political situation was fully disfavor of real sector investment and Banks did not increase their loans & advances to increase their profitability but Banks had to bear the costing of deposit. So Banks & other FIs suffered from excess liquidity problem. To control the situation Bangladesh Bank (BB) sold more T-Bills & T-Bonds to control the excess liquidity position